首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   272篇
  免费   13篇
  2023年   6篇
  2022年   3篇
  2021年   3篇
  2020年   4篇
  2019年   12篇
  2018年   12篇
  2017年   20篇
  2016年   13篇
  2015年   16篇
  2014年   14篇
  2013年   40篇
  2012年   12篇
  2011年   11篇
  2010年   16篇
  2009年   11篇
  2008年   8篇
  2007年   9篇
  2006年   10篇
  2005年   7篇
  2004年   4篇
  2003年   7篇
  2002年   2篇
  2001年   3篇
  2000年   3篇
  1999年   3篇
  1998年   3篇
  1997年   2篇
  1996年   2篇
  1995年   1篇
  1994年   6篇
  1993年   1篇
  1992年   2篇
  1991年   1篇
  1990年   2篇
  1988年   1篇
  1985年   2篇
  1984年   2篇
  1983年   1篇
  1981年   2篇
  1980年   1篇
  1978年   1篇
  1976年   1篇
  1975年   1篇
  1973年   2篇
  1972年   1篇
  1969年   1篇
排序方式: 共有285条查询结果,搜索用时 15 毫秒
231.
232.
Since the onset of the economic reforms more than three decades ago, the Chinese growth miracle has been based on exports and investment. While strong output growth was maintained even during the financial crisis, imbalances within the country increased. To return to a more sustainable development path, recent government policies have aimed to improve the role of private consumption. This article argues that China's institutional framework is an impediment to this strategy, as it weakens the incentives of households to consume. As well as a low level of social security and highly regulated financial markets, the authors stress the relevance of the hukou system as the main driver for modest consumption, especially in recent years. After controlling for different income levels, the average propensity to consume is found to be significantly lower for migrants, as their access to public services is limited. If not accompanied by relevant reforms, the urbanization strategy of the government is likely to raise the number of migrants with limited hukou rights, further increasing the downward pressure on consumption. Therefore, in the absence of reforms in the household registration system, the shift towards consumption‐driven growth is at risk.  相似文献   
233.
234.
Abstract

While recent scholarship has emphasized the role of the colonial experience in the development of the idea of Europe and European integration, notions of European solidarity in the age of imperialism have largely been ignored. This paper investigates the specific context in which journalists and politicians voiced such pleas for solidarity, explores the motivations for them, and probes their limits in times of tension. A closer look at the actors involved illustrates the strictures placed on ideas of European solidarity and illuminates the limited potential of projects of integration prior to 1914. However, latter considerations notwithstanding, a discourse on European solidarity in a colonial context did emerge in the decades before the First World War, allowing early proponents of integration to view colonialism as a field for common European action.  相似文献   
235.
ABSTRACT

This research examines the chemical impacts to soils caused by the industrialisation (mechanisation and mass production) of sugar and rum manufacturing in the Caribbean during the eighteenth and nineteenth centuries. Soils and sediments excavated from Betty’s Hope sugar plantation (1674?1944) are chemically characterised by mild acid extraction and inductively coupled plasma-mass spectroscopy. These data are integrated with analyses of soil properties, including colour, texture, pH and organic matter, to examine activity patterns in areas associated with a large multi-use building dating to the period of industrialisation. Quantitative analysis of the data employs zero-order and partial linear correlation, multidimensional scaling, principal components analysis and spatial interpolation using semivariogram modelling and Kriging. The results reveal the locations of activity areas inside the building, which aids in understanding its role in sugar and rum production. The research also reveals evidence for soil contamination by heavy metals (lead and mercury), suggesting that plantation sites from this period may be polluted with industrial wastes. These findings have implications for activity reconstruction in the archaeological past as well as environmental and community health issues today.  相似文献   
236.
237.
This article examines the combined effects of what mathematician Benoit Mandelbrot has termed “Noah” and “Joseph” effects in U.S. national government budgeting. Noah effects, which reference the biblical great flood, are large changes or punctuations, far larger than could be expected given the Gaussian or Normal models that social scientists typically employ. Joseph effects refer to the seven fat and seven lean years that Joseph predicted to the Pharaoh. They are “near cycles” or “runs” in time series that look cyclical, but are not, because they do not occur on a regular, predictable basis. The Joseph effect is long‐term memory in time series. Public expenditures in the United States from 1800 to 2004 shows clear Noah and Joseph effects. For the whole budget, these effects are strong prior to World War II (WWII) and weaker afterward. For individual programs, however, both effects are clearly detectable after WWII. Before WWII, budgeting was neither incremental nor well behaved because punctuations were even more severe and memory was not characterized by simple autoregressive properties. The obvious break that occurred after WWII could have signaled a regime shift in how policy was made in America, but even the more stable modern world is far more uncertain than the traditional incremental view.  相似文献   
238.
In order to comprehend the condition of vertebral osteophytosis, vertebral osteoarthritis and DISH (diffuse idiopathic skeletal hyperostosis) with respect to diagnosis and aetiology, the vertebral and peripheral (appendicular) frequency and distribution pattern of degenerative joint changes of 176 rather affluent citizens were analysed from the late medieval city of Dordrecht in Holland. Patterns of frequencies with respect to age and sex were found to be similar essentially to those of a present-day Dutch suburban village population. Frequencies for vertebral osteophytosis were twice those for vertebral osteoarthritis, and both increased with age in both sexes. The individual pattern of vertebral osteophytosis and vertebral osteoarthritis seems to indicate that each disorder possesses its own progressive identity. From the distribution pattern and frequency of peripheral osteoarthritis it was concluded, with respect to the vulnerability of developing this complication under physically moderate life conditions, that causal factors for vertebral osteophytosis are less important than those for vertebral osteoarthritis. Osteoarthritis presented itself as a systemic disorder, affecting synovial joints in general. Finally it was appreciated that, with increasing age, bony outgrowths from joint degeneration become anatomically masked by para-articular ossifications from DISH.  相似文献   
239.
240.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号